http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
User's manual for estimation of dissolved-solids concentrations and loads in surface water
by Timothy D. Liebermann, Robert F. Middelburg, and Scott A. Irvine ; prepared in cooperation with the U.S. Bureau of Reclamation.
"A computerized method using data from WATSTORE--National Water Data Storage and Retrieval System of the U.S. Geological Survey."
Includes bibliographical references (page 16).
National Water Information System (U.S.)
Water-resources investigations report ; 86-4124